Sequel, as in "my sequel" because it takes less time. I gravitated to this when I started having to use the term a lot more. Interestingly, I still say "post gray ess queue ell", dunno why. Actually, more often I'll just say "post grays" because the "SQL" at the end doesn't help disambiguate from anything else that starts with "postgre"
I usually pronounce PostgreSQL "post-greh-see-quel", though sometimes I use the pronunciation you give, just as sometimes I pronounce MySQL as "my-s-q-l". Partly it depends on the conversation, since I tend to fall into whatever the other person is calling it.
